XML 60 R40.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Dividends (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2014
Dividends [Abstract] |
Dividends Paid In Total And Per Share | The following table presents shareholder dividends paid in total and per share:
| Year Ended December 31,
| 2014 |  | 2013 |  | 2012
| (Amounts in thousands, except per share data)
Total paid | $ | 135,496 |  |  | $ | 134,776 |  |  | $ | 134,105 |
Per share | $ | 2.4625 |  |  | $ | 2.4525 |  |  | $ | 2.4425 |

X
- Definition Schedule of dividends paid in total and per share [Table text block] + References No definition available. + Details
Name: | mcy_ScheduleOfDividendsPaidInTotalAndPerShareTableTextBlock
Namespace Prefix: | mcy_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DividendsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration